Photo by Tudor Van Hampton for ENR Westport's concept Ford F-550 bi-fuel truck was fitted with a hardened V-10 gasoline engine, LNG injector rails and a cryogenic tank behind the cab. Related Links: Test Drive: Life On the Road With Natural Gas DOE Approves Fourth LNG Export Facility Fleet owners contributing to the natural gas extraction boom are increasingly looking to power their equipment on it. However, the alternative fuel's up-front cost and lack of infrastructure remain steep barriers to mainstream adoption.Potelco, a utility firm in the Pacific Northwest and unit of Quanta Services, is experimenting with running medium-duty construction
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.